Type-writing machine.



O. HULTGREN.

YYPE WRITING MACHINE.

APPUCATXUN PatenmiSept. 26, 1916.

INVENTOI? A romvr UnITED STATES PATENT OFFICE.

OTTO HULTGREN. OF BRIDGEPORT, CONN ECTIGUT, ASSIGNOR TO THE NOISELESSTYPE- WRITEB COMPANY, OF MIDDLETOWN, CONNECTICUT, A CORPORATION OF CON-NEoTIoUT.

TYPE-WRITING MACHINE.

Patented Sept. 26,

Application filed June 12, 1914. Serial No. 844,610.

TouZZ whom 1'2 may concern Be it known that I, O'rro HUL'IGREN, aSubject of the King of Sweden, residing at Bridgeport, in the county ofFairfield and State of Connecticut, have invented certain new and usefulImprovements in T ype- Writing Machines, of which the following is a,iull, clear, and exact description, such as will enable others skilledin the art to which it appertains to make and use thesame.

This invention relates to typewriting machines, and with regard tocertain more specific features thereof, to stops adapted to silentlyarrest the movement of a moving part.

One of the objects of the present invention is to provide a simple andinexpensive stop of the above character adapted to prevent rebounding ofthe arrested member.

Another object is to provide a practical stop of the above characterparticularly adapted to coact with a moving part of the type actionwhich will be efficient in operation.

Other objects will be in part obvious and in part pointed outhereinafter-i I The invention accordingly consists in the features ofconstruction, combinations of elements and arrangement of parts whichwill be exemplified in the construction hereinafter set forth, and thescope of the application of which will be indicated in the followingclaims.

In theaccompanying drawing, wherein is shown one of variouspossibleembodiments of this invention, there is shown in elevation aportion of a type action with the parts in their. iormal position ofrest.

The present invention will hereinafter be described with relation to itsapplication to the type action of the noiseless typewriting machine,although it is to be understood that it is applicable to other forms ofmachines and in other relations.

In the accompanying drawing, 1 denotes the front wall of the frame ofthe machine, upon which the type actions, only one of which isherein'shown, are supported in a radially disposed relation with respectto a common printing point. Each type action in the present caseincludes an adjustable L-shaped bracket 2, mounted in a groove 3 in thetop of the front wall 1. Pivotally supported at 4, at the lower part 10fthe bracket 2 is a bell-crank lever liaving an upwardly extending arm 5,a rearwardly extending arm 6 and a forwardly extending arm 7. The arm 6is designed to be actuated by a key-lever, not shown, butmountedtherebeneath to swing the upper arm 5 rearwardly. The arm 7coacts with an adjustably mounted pad 9 suspended from the front wall 1.

At the upper part of the arm 5 is a link 8 pivoted intermediate itsends. Its rear end is connected at the point 10 with a T- shaped link11, one end of which is pivthis form of type action is fully describedin the co-pending application of Nils H. An-

derson, for improven'ients in typewriting machines, filed August 6,1913, Serial No;

783,331, a further discussion thereof is believed to be unnecessary.accumulator weight has a peculiar path of travel, for it not only has aswinging action about the point 4; when moving to the position shown indotted lines, but also has an independent pivotal movement about itscentral pivot point of connection with the bell-crank lever. Its centertherefore follows the dotted line connecting the full and dottedpositions of these two parts, and this curve is, so far as its effectiveportion herein shown is concerned, of a hyperbolic character, that is,its ends tend to approach straight lines. In order to silently arrestthemovement of this weight on its return to normal position, there isprovided a cushion16 of leather, felt or other suitablesemiresilientmaterial. This cushion is mounted in achannel'support 17, whichis'curved to conform with :the radially disposed position of the typeactions and is supported on brackets'l8 secured at intervals in anydesired manner to the front wall ofthe machine.

It will be noted from the drawing that the upper surface of the cushion16 is inclined at a slight angle With respect to the horizontal, andparallel to the under surface 20 of the momentum accumulator weight 15when in normal position. This upper sur- This momentum face of thecushion 16 is also disposed at .a slight angle with respect to the endof the .path of travel of the center of the momendence, the weight andtype action will be brought to rest quietly and Without rebound.

As the operation of-this device is believed.

to be clear from the above description, a further discussion thereof isthoughtto be unnecessary. 1

It is thus seen that the present invention provides a simple andpractical stop which is eflicien'i; and reliable in use in silentlybringing the movable part to rest.

As many changes could be made in the above construction .and 'manyapparently widely different embodiments of this invention could be madewithout departing from the scope thereof,.it is intended thatall-matt'er contained in the above description or shown in theaccompanying drawings shall be interpreted as illustrative and not in alimiting sense.

Having .describedmy invention, what I claim as new and desire to secureby Letters Patent is:

1. In a typewriting machine, in combination, a type action including apivotally movable member .havinga final 'ath of travelwhich approaches astraight line, and

a cushioned stop therefor-arranged on the side thereof toward its axis,said stop having an active surface disposed at an angle of substantiallyfifteen degrees to the final path of travel of said member.

2. In a typewriting machine, incombination, a typeaction including apivoted lever,

a Weight pivoted thereto, and a cushioned stop for said weighthaving anactive surface disposed at substantially a right angle to the pivotalmovement thereof about its own axis, and at an acute angle to thepivotal movement thereof about the axis of said lever. p

' In testimony whereofI afiix my signature,

in the .presence of two witnesses.

. OTTO HULTGREN.

WVitnesses:

G. M. NEWMAN, i

NILS H. ANDERSON.

